What could be causing this?
I just replaced the head gasket on my suburban about 2 weeks ago and it was running great. While I had the head off, I cleaned the carbon build up off the head and top of the piston and checked everything which looked to be good and healthy. There was no scoring in the cylinder and the valves seemed tight, without taking the valve spring inspection cover off.
Today I noticed that it was leaking in the same spot again, just above the carb. I was degreasing the motor and sprayed some soap and thats when I noticed it was bubbling out. I tightened the head bolts down and it was still bubbling. I am going to pull the head off again tomorrow and check it again. Hopefully there are not any cracks anywhere.
65 Sears Suburban 8 HP w/ 10 HP repower (The Old Tractor)
72 Ford LGT125 (The Hydro) with Johnson FEL
74 Ford LGT100 (The Ford) with 48" Dozer, 48" Mid grader, 50" Mower and a 42" snow thrower for attachments
And I drive a 00 VW beetle TDI as daily, 94 f250 4x4, 86 F350 4x4 currently a project
"There is a sickness worse than alcohol and dope, it is the tractor debt, and there is no cure in sight."